Compressor



Feb. 6, 1923 E. WILSON. COMPRESSOR.

2 SHEETS-SHEET l.

FILED APR. 9| 192i.

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E. WILSON.

COMPRESSOR. FILED AP`R.9,1921.

Feb. 6, ,1923.

2 SHEETS-SHEET 2.

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EDVETARD WILSQN, OFy ST. LOUIS, `IIIZJJISSOUBJI, ASSIGNR T0 WILSON `Elll'tirlll'ElElatll'lll'G COMPANY, OF ST. ILUIS, MISSOURI, A-CORPRATEON @F LHSSOURE.

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I Application leiipril, 1921. Serial No. 459,944.

To all whomz't may concern."A

iBe it known that l', EDWARD llllILsoN, a citizen of the United States, residing at St. LouisgMissouri, have invented a new and useful Compressor, fof which the following is a speciicaition.

'lhis invention relates to compressors. An object of the invention is to provide la compressorl of novel and simplified construction, whereby the operative mechanism of the compressor is certainly maintainedin a condition of highest eliiciency! and whereby the operative parts automatically retain proper' relative' adjustment during` the operationo'f the compressonf Another object of the invention -is to provide a novel system of lubrication for the operative mechanism of the compressor.

Another object of the invention isto provide an oscillating. piston shaft of a comf pressor with distinctively novel and eiicient means for supporting'the same in proper relative position,I and for permitting the mechanism driven thereby to maintain proper relationship as to all partsl Another-object of the invention is to provide a compressor which is compact and in which'the operating mechanism is enclosed within a stationary support and immersed in oil, the operative parts -being properly constructed and arranged to permitthe oil to maintain perfect lubrication.

,Various other objects of the invention and numerous advantages obtained thereby will be madey apparent by the following description, reference being made to the drawings in which- I Fig. l lis a view, partly in section, showing many of the novel eatures ofthe invention. t i

Fig. 2 is a cross sectional view approximately von `the line" 2 2 of Fig. 1.

lig. 3 is a sectinal view. on the line 3-3 of Fig. 1.

Fig. l isa view showing other features of the invention, the oscillating piston shaft being shown in section and the combinedbushlng and thrust member being in elevation.

'llhe compressor comprising my present inventlon 1s a compact and self-contained structure in which the operative mechanism ing sectors 17 driven by a motor which may be included as an integral part of the machine, as shown.

'if-ls shown., the base 1 constitutes the support for the compressor and the motor 2. rlhe motor 2 is mounted on the base 1 and is @arranged to operate the operative mechan ism of the compressor by proper connections.'` A desirable form' of such connections tor operating the compressor from the mot/or isshown. A

ln the form shown the connections from the' motor to the operating'mechanism ofV the compressor includes a y wheel 3 enclosed within a part t of the caseeol the machine. 1 'llhe part 4 of the machine .case connects with -the motor case at one end and is united' with the compressor case proper, at the opposite end so as to obtain the 'desired rigidity of the connected parts. A wall 5 in connection with the case has a cylindrical extension 6 supporting anti-friction bearings 7 in which the hub of the Hy vwheel 3 is journaled for rotation. 'lhe hub of the Hy wheel 3 is mounted on',a bushing 8 which is keyed to the shaft .of the motor by a key 9. The fly wheel is held rigid Vwith the bushing and the bushing is rigid with the motor shaft. f A wrist pin '10 extends from the bushing 8 eccentrically with respect to the axis of the motor shaft.v rllhe wrist pin 10 constitutes a'support for amanti-friction bear'- ing 11 upon which an arm 12 is mountedfor rotation. f

rllhe part of the case or housing of the vcompressor which encloses the compressor mechanism includes a stationary housing 13 rigidly mounted on the base 1. A non-rotative supporting'cylinder la is within the housing 13. As shown, the cylinder 14 is rigid with the housing and is incapable of any movement ,relative thereto.I A non-rotative-cylinder 15 is mounted within the. cylinder 14 and is held from rotation by keyslt which, however, permit axial movement ot the cylinder 15 within the supporting cylinder 14.'-

A'ill in order to' maintain perfect adjustment of the partsA and to permit the parts to adjusted in accommodation to each other. 'llhe cylinder 15 is provided with one or more compression chambers, said compression chambers bein formed by inwardlyextendilFig. 3 )whose inner ends contact with the rocking piston shaft 18. @ne end of the piston shaft 18 is journaled for ill@ for that purpose; and from the housin iwheel 3 than is the wrist pin 10. though this arrangement may be otherwise if desired.

As shown, the interior of the cylinder 15 is divided into two compression chambers by the sectors 17. The piston comprises sectors 21 integral with the rock shaft 18 arranged to operate within the compression chambers in the cylinder 15.

y As shown, the shaft 18 has a. passage 2 2 arranged to receive the air from an air chamber 23 to which the air is admitted through an inlet 24. The means for controlling admission of airv from the passage 22 to the .compression chambers may be of any desired construction and arrangement such, for instance, as that disclosed in my companion application Serial No. 424,034, but since such controlling means is not speciically claimed herein the same is not shown or described in detail. So, also, the means for controlling the outlet passages 25 which o through the sectors 17 isnot specifically s own herein, that shown in my said comp-anion application being satisfactory. The passages 25 open into a circumferential chamber 26 around the cylinder 15 and within the cylinder 14. From the chamber 26 the compressed air passes into the housing 13 through appropriate openings 27 provided 13 the compressed air is taken to any deslred point of use through a passage 28.

It will be seen by reference to Figs. 1 and 2 that the wrking parts within the housing 13 are immersed in oil. The level of the 0i1- is below the openings 27 so that no material quantities of the oil will be cause-d to enter the chamber 26 through the openings 27. Such small quantities of the oil as work through the operative parts and into vthe compression chambers of the machine will be forced out as an incident to operation of compression and into the chamber 26. The oil received within the chamber26 will be 'carried therefrom by the movement of the.

compressed air and returned to the housing 13. An oil gage 29 may be provided in con` nection with the machine so that the depth of the oil may be observed.

The walls of the ends of the compression chambers which are in the cylinder 15 are of novel and improved construction and arran ement in this compressor. The wall 30 at tie outer end of said compression chambers is formed with a hub 31 land is keyed' to the shaft 18. Thus, while the cylinder 15 is held from rotation or rocking,` the end wall 30 thereof .rocks with the shaft 18 therel' wall ofo the cylindrical member 32 which p communicates'with the airlreiving chamber 23. A nut 33 screws onto the end of the shaft 18 and clamps the end of the cylindrical member 32 against the inner ring of the anti-friction bearing 19 which is also abutted against the end wall 30. The cylindrical member' 32 is formed with a number of circumferential grooves 34 adapted to receive oil that works from the housing 13 through the operative parts. In p-racticeit has been found that a suicient quantity of oil will work into and through the bearings to maintain proper lubrication. The sprmg 35 may be mounted to exert pressure against the outer end of the bearing so as to press the end wall 30 into contact with the end of the cylinder 15. '1n some cases thespring 35 will not be needed and l contemplate the omission of such spring wherever its presence will not be useful. ln any case the spring is needed only to bala-nce the pressure at theopposite end of the machine and, since such pressure becomes balanced when the machine is placed in operation', the spring is needed in any case only at the starting of the machine.

The wall 36 at the endof the compression cylinder opposite from the wall 30 is keyed to the shaft 18 -and rocks with said shaft as does the Wall 30. The Wall 36 is in the form of a thrust membery having a flange 37 arranged to operate against the part 38 in which the hub of the wall thrust member is mounted for rocking movements. A number of holes 39 (Figs. 1 to 4) open through the flange 37 into 'a circumferential groove or chamber 4() in the face of the flange 37 that operates against the part 38. This permits oil from the housing 13 to pass into the groove or chamber 40.a The oilworks .from the groove or chamber 40 between the operating parts, keeping them, in a lubricated condition, and filling the grooves 41 around the hub of the wall thrust member within the supporting part 138. The use of this con-` struction-eliminates the 'need for a stuffingboX.

From the foregoing it will be seen that the piston, including the sectors'21, is mounted for rocking movements within the stationary cylinder v15. Such rocking movements are imparted by the driving :connections from' the motor, part of which has already been described, including the arm 12 which is supported eccentrically relative to the aXis of the motor shaft. An arm 42 is attached to the end of the shaft 18` and has its 'end overlapping the -end of the arm 12. The arms 12 and 42 are pivotally Iunited by an magere vanti-friction pivot connection 43 (Fig.

-As .a result of this construction a rocking movement is imparted to the shaft 181by the continuous rotation of they motor shaft 'in one direction. llt will be seen that the support 10 for the arm 12 rotates around the plane of the'axis ofthe shaft 18 and that,

, as a resultl of the novel arrangement and construction shown and described, a rocking movement is imparted tothe shaft 18'and thereby to the pistons 21 by such rotary movement of the arm 12.

Ilhe described or equivalent means for obtaining the results disclosed constitute im-V portant features of the present invention. My invention accomplishes all of its i tended objects and variations may be ma e in the construction and arrangement of the parts without departure from the scope and nature of the invention. l do not restrict myself to unessential' features, nor otherwise, except as set forth in the appended claims.

WVhat l claim and desire to secure by Letters Patent, is:-

1. A compressor, ycomprising a housing,

a stationary cylinder within the housing, a

non-rotative cylinder supported within the stationary cylinder and being capable of axial movement therein, a rocking 'piston within the non-rotative` cylinder, end walls tor they non-rotative cylinder arranged to rock with the piston, a shaft for operating said piston, a power driven shaft supported out of alinement with the piston shaft, and connections from the power driven shaft to the piston shaft for imparting rocking movementsA to the pistonshaft by the continuous rotation of the power driven shaft vin one direction.

25A compressor, comprising a housingv arranged `to contain oil and to receive compression above the level of the oil, a nonrotative cylinder below the level of the o1l the cylinder, pistons arranged to operate within said chambers, a rock shaft vfor rocking said pistons, end walls for the cylinder arranged to rock With said rock shaft, a rotary motor shaft, and,connections operated by the motor shaft for imparting'. rocking movements to the piston shaft by the continuous rotation of the motor shaft in one direction. i

3. A compressor, comprising la stationary housing arranged to contain oil and to receive compression above the level of the oil, an axially adjustable non-rotative cylinder within the housing,.compression chambers in said cylinder, pistons arranged to operate v Ywithin the compression chambers of the `cylinder,.mechanism.for rocking said pistons, end walls for the compression chambers in the cylinder, and means dor movin'gthe end walls' with the pistons.

d. A compressor-, comprising a stationary housing arranged to contain oil in the bottom portion thereof, and to receive compression above the level of the' oil, a stationary cylinder in the, housing, a non-rotative cylinder supported within the stationary cylinder and being capable of axial adjustment relative thereto, a chamber in the stationary cylinder arranged to receive compression from the non-rotative cylinder and opening into the housing above the level of the oil, compression,` pistons within the non-rotative cylinder, and mechanism. for operating the compression pistons.

5; A compressor, comprising a stationary housing arranged to contain oil in the bottom portion thereof, and to receive compression above the level of the oil, a stationaryv cylinder within the housing, a non-rotative 'cylinder within the stationary cylinder below the level of the oil, a chamber below the level of the oil arranged to receive compression from the non-rotative cylinder and opening into the housing abovethe level of the oil, a piston shaft extending through the non-rotative cylinder, pistons in connection withsaid shaft, end walls supported by the shaft and arranged to move therewith relative tovthe non-rotative cylinder, a power shaft supported out of alinement with the piston shaft, and mechanism for rocking the piston shaft by .the continuous rotation of the power shaft in one direction.

6. A compressor, comprising a housing, a cylinder within the housing, compression chambers in said cylinder, a piston shaft supported .for rocking movements, pistons on said shaft arranged to operate within said chambers, end thrust walls for said cylinder, and means for rocking said walls with the piston shaft.

7. A compressor, comprising compression chambers, a pistonshaft, pistons arranged to operate within said compression chamin the houslng, compresslonv chambers vpthln bers, end walls vtor the compression chamberskeyed to the piston shaft, anti-friction bearln'gs for said shaft, and means including sald anti-friction bearings for holding the end walls in position to close the ends of the compression chambers.

8. A compressor, comprising a motor, a rotaryshatt driven by the motor, a piston shaft, pistons on said piston shaft, compresslon chambers within which said pistons operate, end walls for the compression chambers arranged to operate with the piston shaft, means for holding the end walls in position to close the ends of the compression chambers, and connections from the rotary shaft to the piston shaft for imparting` rockmg movements to the piston shaft by the continuous rotation of the rotary shaft in one direction.

9. ln a compressor, the combination with. a rocking piston shaft, of a motor, a rotary shaft driven by said motor, a support in kso connection with the rotary shaft, an arm .said chambers, means-for rocking said piston shaft to operate said pistons, and end walls for said piston chambers supported by and arranged to rock with said piston shaft.

l1. A compressor, comprising a stationary housing, a cylinder rigid within the housing, a non-rotative axially adjustable cylinder in the rigid cylinder, a'chamber within the rigid cylinder, piston chambers in the axially adjustable cylinder, a piston shaft,

pistons on said shaft arranged to operate in said chambers, means for rocking said piston shaft tol operate said pistons, end walls for said piston chambers supported by and arl yranged to rock with said piston sha-ft, antifriction bearings for said piston shaft, and

means including said anti-friction bearings for holding said end walls thrust against the end of the axially adjustable cylinder to close the ends of the chambers therein.

l 12. A compressor, comprising a stationary housing arranged to contain oil in the lower portion thereof and to receive compression therein above the level of the oil, a nonrotative axially adjustable cylinder supported Withinthe housing below the level of the oil, compression chambers in said cylinder, mechanism for effecting compression in the compression chambers of the cylinder, and means for discharging the compression from the compression chambers in the housing above the level of the oil.

13. A compressor, comprising a stationary housing arranged to contain oil in the lower portion thereof, a non-rotative cylinder supported within the housing below the level of the oil, compression chambersin said cylinder, a piston shaft extending through the cylinder, pistons on said shaft within the compression chambers, end walls closing the ends of the compression chambers immersed 15. A compressor, comprising a stationary cylinder, a non-rotative cylinder supported for axial movement and adjustment in the u stationary cylinder, compression chambers extending'l through the second cylinder,

Amechanism for rocking the piston shaft,

means for rocking the end walls with the piston shaft, pistons on the piston shaft within the second cylinder, anti-friction bearings supporting the piston shaft, and means -including the anti-friction bearings for holding the end walls thrust against the ends of the second cylinder to close the ends of the compression chambers.

16. A compressor, comprising a rigid cylinder, a compression cylinder within the rigid cylinder, means holding the compression cylinder fromjrotating and permitting axial adjustment thereof in the rigid cylinder, a piston shaft extending through the compression cylinder, a power shaft, means for imparting rocking movements to the piston shaft by the continuous rotation of the power shaft in one direction, end walls for the compression cylinder arranged to rock with the piston shaft, anti-friction bearings for the piston shaft, and means including the anti-friction bearings for holding the end walls thrust against the ends of the compression cylinder. j

EDWARD WILSON.

Within the second cylinder, a piston shaft 75 

